Bently Nevada 3500/42M-01-00 128229-01 Prox/Seismic I/O Module

Bently Nevada 3500/42M-01-00 (Part Number: 128229-01): Description

The Bently Nevada™ 3500/42M-01-00 (part number 128229-01) is a four-channel Proximitor Seismic Monitor designed for the 3500 Machinery Protection System. It specializes in receiving signals from proximity, seismic (velocity, acceleration), and Seismoprobe transducers, conditioning these signals to deliver critical machinery measurements while enabling user-programmable alarm setpoints for machinery protection and operational monitoring.

Configured with the model suffix "01-00", this monitor features a Prox/Seismic I/O Module with Internal Terminations (designated by "01") and no agency approval (designated by "00"). It supports channel pairing programming, allowing up to two simultaneous measurement functions—for example, channels 1 and 2 can perform one function while channels 3 and 4 handle another (or the same). The monitor provides alert setpoints for all active static values and danger setpoints for any two active static values, configurable via the 3500 Rack Configuration Software.

Key capabilities include monitoring radial vibration, thrust position, eccentricity, differential expansion, REBAM, acceleration, velocity, shaft absolute parameters, and circular acceptance region. It features front-panel LEDs (OK, TX/RX, Bypass) for real-time status indication, including operational health, communication with other 3500 rack modules, and bypass mode. The monitor delivers short-circuit protected buffered transducer outputs, a -24 Vdc transducer power supply, and 4–20 mA recorder outputs proportional to full-scale values, ensuring reliable signal transmission and integration with external diagnostic systems.

Compliant with global industrial standards, it adapts to harsh operating environments and supports hazardous area deployments when paired with appropriate I/O modules. It requires specific firmware and software versions for full functionality, including advanced features like REBAM and shaft absolute monitoring, making it a versatile solution for protecting rotating machinery in industries such as power generation, oil & gas, and manufacturing.

Key Parameters

Model & Part Number: 3500/42M-01-00, 128229-01

I/O Module Type: Prox/Seismic I/O Module with Internal Terminations; supports proximity, acceleration, velocity transducers, and Seismoprobe (Prox/Accel and Velomitor are supported but not recommended)

Agency Approval: None (designated by "00")

Channel Configuration: 4 channels, programmable in pairs (supports up to 2 simultaneous functions)

Supported Measurements: Radial vibration, thrust position, eccentricity, differential expansion, REBAM, acceleration, acceleration II, velocity, velocity II, shaft absolute (radial vibration/velocity), circular acceptance region

Input Specifications:

Accepts 1–4 signals from proximity, velocity, acceleration, or Seismoprobe transducers.

Input impedance: 10 kΩ (proximity and acceleration inputs).

Power consumption: Typical 7.7 Watts.

Transducer power supply: -24 Vdc.

Sensitivity:

Radial vibration, thrust, eccentricity: 3.94 mV/μm (100 mV/mil) or 7.87 mV/μm (200 mV/mil).

Differential expansion: 0.394 mV/μm (10 mV/mil) or 0.787 mV/μm (20 mV/mil).

REBAM: 40 mV/μm (1000 mV/mil) or 80 mV/μm (2000 mV/mil).

Acceleration/Acceleration II: 10 mV/(m/s²) (100 mV/g).

Velocity/Velocity II: 20 mV/(mm/s) pk (500 mV/(in/s) pk), 5.8 mV/(mm/s) pk (145 mV/(in/s) pk), or 4 mV/(mm/s) pk (100 mV/(in/s) pk).

Shaft absolute (radial vibration/direct): 3.94 mV/μm (100 mV/mil) or 7.87 mV/μm (200 mV/mil).

Output Specifications:

Buffered transducer outputs: 4 front-panel coaxial connectors (short-circuit protected), output impedance 550 Ω.

Recorder outputs: 4–20 mA (proportional to full-scale), voltage compliance 0–12 Vdc, load resistance 0–600 Ω, resolution 0.3662 µA per bit.

Shaft absolute buffered outputs (if configured): 1 per channel group, short-circuit protected, output impedance 300 Ω.

I/O module supply parameters: 23.9 Vdc, 45.5 mA, 1.09 W (Prox/Accel/Velomitor); 6.82 Vdc, 2.75 mA, 0.02 W (Seismoprobe).

Frequency Response (key functions):

Radial vibration: Direct filter (4 Hz–4000 Hz or 1 Hz–600 Hz, user-programmable), Gap filter (-3 dB at 0.09 Hz).

Acceleration: 3–30,000 Hz (Peak), 10–30,000 Hz (RMS); 4-pole high/low-pass filters.

Velocity: 3–5,500 Hz (Peak/peak-to-peak), 10–5,500 Hz (RMS); 2-pole high/low-pass filters.

REBAM: Spike (0.152–8678 Hz), Element (0.139–3836 Hz), Rotor (0.108–2221 Hz) (user-programmable).

Accuracy: Typically ±0.33% of full-scale, maximum ±1% (excluding filtering); phase error max 3 degrees; alarm setpoint accuracy ±0.13% of desired value.

Alarm Functionality:

Alert/danger setpoints: 0–100% of full-scale (limited by transducer range).

Time delays: Alert (1–60 seconds, 1-second intervals); Danger (0.1 seconds or 1–60 seconds, 0.5-second intervals) (excluding REBAM/Shaft Absolute Velocity).

Physical Dimensions:

Monitor module (main board): 241.3 mm × 24.4 mm × 241.8 mm (9.50 in × 0.96 in × 9.52 in), weight 0.91 kg (2.0 lb).

I/O module (non-barrier): 241.3 mm × 24.4 mm × 99.1 mm (9.50 in × 0.96 in × 3.90 in), weight 0.20 kg (0.44 lb).

Rack Space Requirements: 1 full-height front slot (monitor), 1 full-height rear slot (I/O module).

Environmental Limits:

Operating temperature: -30°C to +65°C (-22°F to +150°F) (non-internal barrier I/O); 0°C to +65°C (32°F to +150°F) (internal barrier I/O).

Storage temperature: -40°C to +85°C (-40°F to +185°F).

Humidity: Up to 95% (non-condensing).

Certifications & Compliance: FCC Part 15; EU EMC Directive 2014/30/EU (EN 61000-6-2, EN 61000-6-4); EU LV Directive 2014/35/EU (EN 61010-1); RoHS Directive 2011/65/EU; maritime certifications (ABS, DNV GL).

Software & Firmware Requirements: Compatible with 3500/01 Software v2.50+, 3500/02 Software v2.20+, 3500/03 Software v1.21+; advanced features require updated firmware/software (e.g., REBAM needs firmware v2.1+ and 3500/01 Software v3.30+).

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